The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Dynaco VTA tube amp kits, all Tubes4hifi.com products and all Dynakitparts.com products


    SP 8 Capacitor and Transformer info please

    Share

    Tom

    Posts : 166
    Join date : 2011-04-04

    SP 8 Capacitor and Transformer info please

    Post by Tom on Mon Apr 04, 2011 10:36 am

    Hi All, new guy here, have been lurking but now have an SP-8; and,
    while Roy is on vacation I thought I'd try the forum for some info.

    Capacitors that don't have their polarity marked on the wiring diagram are unpolarized, Right?
    Circles on the board rather than squares and circles.
    Not soldering any in until I'm sure Embarassed

    and

    Anyone recommend a transformer for the SP-8?
    Secondarys are 2x250v and either 1x12V or 2x6V.

    Thanks!

    Bob Latino
    Admin

    Posts : 2378
    Join date : 2008-11-26
    Location : Massachusetts

    Re: SP 8 Capacitor and Transformer info please

    Post by Bob Latino on Mon Apr 04, 2011 11:45 am

    "Capacitors that don't have their polarity marked on the wiring diagram are unpolarized, Right?"

    Correct - polarity is only (very!) important in electrolytic capacitors. Electrolytic caps have stripe on the side to designate the negative terminal. On the board, a SQUARE soldering pad is for the positive terminal and a ROUND soldering pad is for the negative terminal.

    Bob

    Tom

    Posts : 166
    Join date : 2011-04-04

    Re: SP 8 Capacitor and Transformer info please

    Post by Tom on Mon Apr 04, 2011 12:19 pm

    Thanks Bob,
    I'm working from a 1970's vintage high school electronics shop knowledge base here
    and some of those "circuits" seem to have gone dark on me Rolling Eyes
    Apologies for the remedial questions.

    Tom

    Posts : 166
    Join date : 2011-04-04

    Re: SP 8 Capacitor and Transformer info please

    Post by Tom on Tue Apr 05, 2011 2:38 pm

    Opinion please:

    Hammond 270X transformer has 2x250v and 1x5v and 1x6.3, so 11.3 for the filament.
    Antek AS-1T250 has 2x250 and 2x6.3 for 12.6.

    One better than the other? What do I really need for the filament.
    Any help appreciated!

    Tom Smile

    Sponsored content

    Re: SP 8 Capacitor and Transformer info please

    Post by Sponsored content Today at 12:54 am


      Current date/time is Sat Oct 01, 2016 12:54 am